IOT ETH 以太网

[English]

iot_eth 提供了一整套 4G 模组连接以太网的解决方案,提供底层硬件的抽象层,默认提供基于 LWIP 的网络接口。也支持用户自定义网络接口。

特性

  • 高级工厂模式,支持底层多种连接方式

  • 默认支持 LWIP 网络接口, 也支持用户自定义网络接口

用户指南

  1. 先初始化 driver 层,提供下层硬件抽象

iot_usbh_rndis_config_t rndis_cfg = {
    .auto_detect = true,  // auto detect 4G module
    .auto_detect_timeout = pdMS_TO_TICKS(1000),  // auto detect timeout
};

iot_eth_driver_t *rndis_handle = NULL;
esp_err_t ret = iot_eth_new_usb_rndis(&rndis_cfg, &rndis_handle);
if (ret != ESP_OK || rndis_handle == NULL) {
    ESP_LOGE(TAG, "Failed to create USB RNDIS driver");
    return;
}
  1. 初始化 iot_eth

iot_eth_config_t eth_cfg = {
    .driver = rndis_handle,
    .stack_input = NULL,
    .user_data = NULL,
};

iot_eth_handle_t eth_handle = NULL;
ret = iot_eth_install(&eth_cfg, &eth_handle);
if (ret != ESP_OK) {
    ESP_LOGE(TAG, "Failed to install USB RNDIS driver");
    return;
}
  1. 启动 iot_eth

ret = iot_eth_start(eth_handle);
if (ret != ESP_OK) {
    ESP_LOGE(TAG, "Failed to start USB RNDIS driver");
    return;
}

使用其他网络接口

  1. 发送: 请调用 iot_eth_transmit 发送数据。

  2. 接受: 请配置 iot_eth_config_t 中的 stack_input 回调函数,当有数据接收时,会调用该回调函数。

  3. 获取 4G 模块的 MAC 地址: 请调用 iot_eth_get_addr 获取 4G 模块的 MAC 地址。

已支持的网络接口

API 参考

Header File

Functions

esp_err_t iot_eth_install(iot_eth_config_t *config, iot_eth_handle_t *handle)
esp_err_t iot_eth_uninstall(iot_eth_handle_t handle)
esp_err_t iot_eth_start(iot_eth_handle_t handle)
esp_err_t iot_eth_stop(iot_eth_handle_t handle)
esp_err_t iot_eth_transmit(iot_eth_handle_t handle, void *data, size_t len)
esp_err_t iot_eth_get_addr(iot_eth_handle_t handle, uint8_t *mac)
esp_err_t iot_eth_update_input_path(iot_eth_handle_t handle, static_input_cb_t stack_input, void *user_data)

Structures

struct iot_eth_config_t

Ethernet configuration structure.

This structure holds the configuration for initializing an Ethernet instance.

Public Members

iot_eth_driver_t *driver

Pointer to the Ethernet driver

static_input_cb_t stack_input

Function pointer for stack input

void *user_data

User data for callbacks

Type Definitions

typedef void *iot_eth_handle_t

iot_eth event base declaration

Ethernet handle type

This is a handle to an Ethernet instance, used for managing Ethernet operations.

typedef esp_err_t (*static_input_cb_t)(iot_eth_handle_t handle, uint8_t *data, size_t len, void *user_data)

Static input callback function type.

This type defines a function pointer for a static input callback. It takes an Ethernet handle, a pointer to data, the length of the data, and a user data pointer as arguments.

Enumerations

enum iot_eth_event_t

iot_eth event declarations

Values:

enumerator IOT_ETH_EVENT_START

IOT_ETH driver start

enumerator IOT_ETH_EVENT_STOP

IOT_ETH driver stop

enumerator IOT_ETH_EVENT_CONNECTED

IOT_ETH got a valid link

enumerator IOT_ETH_EVENT_DISCONNECTED

IOT_ETH lost a valid link